Synthesis of 2 and 4-aryl cyclohexenones and of hexahydrodibenzofuran derivatives is described. In anhydroushydrogenfluoride at 0°C, 4-hydroxy-4 methylcyclohex-2 en-1 one 2 reacted to yield ketone 7 (43%). Reaction of ketone 2 with parabromophenol 13b in HF gave ketone 6 (40%) at −20°C and ketone 6 (35%) and 7 (13%) at 0°C. Under similar conditions ketone 2 reacted with phenol 3a to yield 2 and 4